Section 199A QBI Deduction: The 20% Savings Most LLC Owners Miss
Last updated · Tax Deductions
The Section 199A Qualified Business Income (QBI) deduction is the most valuable small business tax break created in the past 30 years. It allows owners of pass-through entities (sole proprietors, LLCs, partnerships, S-Corps) to deduct up to 20% of their qualified business income directly from their taxable income. For a business owner making $200,000, this can translate to $10,000-$15,000 in annual tax savings. Yet many eligible LLC owners either don't know the deduction exists or don't structure their business to fully qualify. This guide explains who gets the full 20%, who gets a partial deduction, and how to maximize the benefit.
What QBI is and how the deduction works
Section 199A was created by the Tax Cuts and Jobs Act of 2017. It gives owners of pass-through businesses a deduction equal to 20% of their "Qualified Business Income" (QBI) from the business.
Qualified Business Income includes:
- Net income from a sole proprietorship (Schedule C)
- Share of partnership income
- Share of S-Corp income (but NOT W-2 wages or distributions)
- Rental income in some cases (must rise to level of a trade or business)
QBI does NOT include:
- Wages from any source (including W-2 wages from your own S-Corp)
- Capital gains
- Dividends
- Interest income (except from business)
- Foreign income
The deduction is taken "below the line" — it reduces taxable income without affecting AGI. It applies to federal tax only, not self-employment tax or state tax (in most states).
Example: a sole proprietor earning $100,000 in net Schedule C income pays federal income tax on only $80,000 after the QBI deduction (20% of $100,000 = $20,000 deducted). At a 22% federal marginal rate, that's $4,400 in tax savings per year.
The income thresholds
QBI deduction rules depend on your taxable income level. 2026 thresholds (approximate, adjusted for inflation):
- Single filer under $197,300: full 20% QBI deduction, no limitations, regardless of business type
- Single filer $197,300 to $247,300: phase-in of limitations
- Single filer above $247,300: full limitations apply
- Married filing jointly under $394,600: full 20% QBI deduction
- MFJ $394,600 to $494,600: phase-in
- MFJ above $494,600: full limitations
Below the threshold, the deduction is simple — 20% of QBI, full stop. Above the threshold, two important limitations kick in: the W-2 wages limitation and the Specified Service Trade or Business (SSTB) limitation.
The W-2 wages limitation
For business owners above the income threshold, the QBI deduction is limited to the greater of:
- 50% of W-2 wages paid by the business
- 25% of W-2 wages + 2.5% of unadjusted basis of qualified property
In plain English: if your business pays W-2 wages (to employees or to yourself as an S-Corp owner), you get more QBI deduction. If your business has zero W-2 wages (like a single-member LLC taxed as sole proprietor with no employees), you may get zero QBI deduction above the threshold.
This creates a strong incentive for high-income business owners to elect S-Corp status:
- LLC sole prop above threshold with $0 W-2 wages: potentially $0 QBI deduction
- S-Corp above threshold paying $80,000 reasonable salary: QBI deduction limited to 50% × $80,000 = $40,000 (or 20% of QBI, whichever is less)
For a high-income consultant earning $300,000, S-Corp election combined with QBI optimization can generate an additional $10,000-$20,000 in tax savings on top of the self-employment tax savings.
Specified Service Trade or Business (SSTB) phase-out
The SSTB limitation is the most restrictive part of QBI. Certain professional service businesses are classified as SSTBs, and above the income threshold they lose the QBI deduction entirely.
SSTB categories:
- Health (doctors, dentists, nurses, vets, physical therapists)
- Law (lawyers, paralegals, legal consultants)
- Accounting (CPAs, bookkeepers, tax preparers)
- Actuarial science
- Performing arts (musicians, actors)
- Consulting (strategy, management consulting)
- Athletics
- Financial services (investment advisors, brokers)
- Brokerage services
- Investing and investment management
- Trading and dealing in securities
- Any trade or business where the principal asset is the reputation or skill of the owner(s)
For SSTB owners:
- Below the income threshold: full QBI deduction applies normally
- In the phase-in range: QBI deduction is reduced proportionally
- Above the full phase-out: NO QBI deduction allowed
This is particularly punishing for successful professional service businesses. A lawyer earning $500,000 as an LLC gets zero QBI deduction. A lawyer earning $350,000 in the phase-in range gets a partial deduction.
Strategies to maximize the QBI deduction
Six strategies for different situations:
- Stay under the income threshold. If you're close to the threshold ($197,300 single / $394,600 MFJ), strategies to reduce taxable income (retirement contributions, HSA, business equipment purchases) can preserve the full deduction.
- Maximize retirement contributions. 401(k), SEP-IRA, and Solo 401(k) contributions directly reduce taxable income and can pull you below the threshold. Up to $70,000 in Solo 401(k) contributions is possible for high-earning self-employed individuals.
- S-Corp election for high earners. Generating W-2 wages through your own salary enables the wages limitation to produce a meaningful deduction above the threshold.
- Reclassify SSTB income if possible. Some businesses that appear to be SSTBs can be restructured to separate non-SSTB activities (sale of products vs provision of services). The classification is fact-specific and requires careful documentation.
- Spouse income considerations. If one spouse has high SSTB income and the other has non-SSTB business income, the SSTB limitation applies only to the SSTB spouse. Careful joint filing planning can preserve the non-SSTB spouse's full deduction.
- Real estate as trade or business. Rental real estate can qualify for QBI if it rises to the level of a trade or business (generally requires substantial time commitment, 250+ hours per year, or meeting safe harbor requirements). This allows landlords to claim the deduction.
The QBI deduction sunset (and legislative uncertainty)
Section 199A was enacted as part of the Tax Cuts and Jobs Act of 2017, with an expiration date of December 31, 2025. Congress must extend or make permanent the deduction before then, or it will disappear for 2026 and beyond.
Status as of early 2026:
- Multiple bills have been introduced to extend the deduction
- The Republican-controlled Congress has generally supported extension
- Extension has not yet been enacted as of this writing
Tax planning uncertainty is real. If the QBI deduction is not extended, the tax math for LLC vs S-Corp choices shifts meaningfully. Business owners should monitor legislation and potentially defer major decisions until the 2026-2027 tax year rules are clearer.
Until extended or allowed to expire, assume the deduction is in effect for 2025 tax returns (filed in early 2026) and possibly 2026 tax returns depending on legislative action.
Frequently Asked Questions
What is the Section 199A QBI deduction?+
A tax deduction created by the 2017 Tax Cuts and Jobs Act that allows owners of pass-through businesses (sole props, LLCs, partnerships, S-Corps) to deduct up to 20% of their qualified business income from taxable income. Can save $2,000-$20,000+ per year for eligible business owners.
Who qualifies for the QBI deduction?+
Owners of pass-through businesses: sole proprietors, single-member LLCs, multi-member LLCs, partnerships, and S-Corp shareholders. C-Corp owners do NOT qualify (the 21% corporate rate is already lower). Income thresholds apply: below $197,300 single / $394,600 MFJ, full deduction. Above the phase-out, limitations may reduce or eliminate it.
What is a Specified Service Trade or Business (SSTB)?+
Professional service businesses including health, law, accounting, consulting, financial services, performing arts, and athletics. SSTB owners lose the QBI deduction entirely when their taxable income exceeds the phase-out threshold. Non-SSTB businesses can still claim the deduction through W-2 wages limitations.
How much is the QBI deduction worth?+
Up to 20% of qualified business income. For a sole proprietor with $100,000 net income at 22% federal marginal rate, about $4,400 per year. For a high earner at 35% marginal rate with a $500,000 business, up to $35,000 per year. Federal tax only — does not apply to self-employment tax or state tax.
Does the QBI deduction apply to S-Corp distributions?+
Yes, but with complications. The S-Corp reasonable salary paid to the owner is W-2 wages (NOT QBI). The distributions from the S-Corp are QBI, subject to the same income thresholds and limitations. Paying a higher salary reduces QBI but may help satisfy the W-2 wages limitation at high incomes.
Is the QBI deduction going away?+
Scheduled to expire December 31, 2025 unless Congress extends it. Multiple extension bills have been introduced. Without extension, the deduction disappears for 2026 and beyond, changing small business tax planning significantly. Monitor legislation for updates.
Do I need to do anything special to claim the QBI deduction?+
For most small businesses below the income threshold, the deduction is automatic on your tax return (Form 8995 or 8995-A). Above the threshold, calculations get complex and usually require a tax professional. The forms require identification of the type of business (SSTB or not) and W-2 wage calculations.